1) magnetic fluid static separation method: magnetic fluid static separation method is a separation method in which magnetic fluid is used as the selection medium and minerals are separated (floating or sinking) according to their different densities and magnetic susceptibility. 2) Magnetohydrodynamic separation: It is a mineral separation method that uses strong electrolyte solution as separation medium under the combined action of magnetic field and electric field to separate different mines according to the differences of density, magnetic susceptibility and conductivity between minerals.